If there is one fix that resolves 80% of these cases, it is this one. The issue is often stuck in a "cache" file where a corrupt token is preventing the registration from refreshing.
If you recently switched between Samsung Messages and Google Messages, the RCS server may still have your number registered to the old app.
However, many users encounter a frustrating roadblock: This error prevents RCS from activating, leaving users stuck on basic SMS/MMS. Below, we break down why this happens and how to fix it.
without attempting to re-enable it to clear the server-side "quota". Clean the App Data : After switching apps, go to your phone's Settings > Apps > Messages (and Carrier Services, if installed), then tap Storage > Clear Cache and Clear Data before trying again. Google's Remote Deactivation : Use the official Google Messages Disable Chat